CompTIA Network+ (N10-007) — Question 103

Which of the following WAN technologies is MOST preferred when developing a VoIP system with 23 concurrent channels?

Answer options

• A. DSL
• B. POTS
• C. T1
• D. DOCSIS

Correct answer: C

Explanation

The correct answer is C, T1, as it provides a dedicated bandwidth of 1.544 Mbps, which can easily support multiple VoIP channels. DSL may not provide consistent quality for VOIP, POTS is limited in capacity, and while DOCSIS can offer good speeds, it is typically shared bandwidth, making it less reliable for concurrent VoIP calls.